Answer: Poles always come in pairs (no monopoles).
- A North pole, which can exist in isolation under strong fields
- B South pole, which can be isolated by cutting a magnet
- C Monopole (they do exist)
- D Poles always come in pairs (no monopoles)
Correct answer: D. Poles always come in pairs (no monopoles)
Explanation: Magnetic monopoles do not exist. Every magnet always has a north AND south pole. Cut a magnet and two smaller magnets form.
Magnetic field of a bar magnet: field lines emerge from the north pole and re-enter at the south pole outside the magnet, forming continuous closed loops. Image: Geek3, CC BY-SA 3.0, via Wikimedia Commons.
Concept context
Bar magnets, Earth's magnetism, and how different materials respond to an external magnetic field - diamagnetic, paramagnetic, and ferromagnetic behaviour.